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J. E. CULVER, OEHUDSON, NEW JERSEY.

Letters Patent N 99,855, dated February k15, 1870.

STEAMENGINE.

The Schedule referred to in these Letters Patent and making part of thesame To all whom it muy concern.- y y Be it known that I, J. E. CULVER,M. D., of the cit and county of Hudson, in the State ot' New Jersey,have invented new and useful Improvements in Steam- Eugines; and I dohereby declare the following to be a full, clear, and exact descriptionof the construction and operation of the same, reference being had tothe accompanying drawings forming part ot'this specification.

My application relates to high pressure engines, and my present purposeis to introduce to the public one which, admitting steam and water intoits cylinder, is adapted to ,work steam, ot' a very wide range oftemperature, withleconom Y The invention consists- Y First, in themethod ot' operating a piston to and fro in'aeylinder, by thecontinuousapplication ofsteam pressure to one side of it, and thealternate'application of steam and atmospheric pressure to the otherside.

Second, in the means l employ to carry out this method, which consistsot' a cylinder and piston, arraugediu combination with a steam-boiler,the cylindcr being open at one end, to permit the contents of the boilerto have ingress and egress, and to act coutiuuously against one side ot'the piston, and having at the other end a suitable head, a steaminlet-pipe, an exhaust-pipe, and a valve mechanism, so operated that theexhaust shall be open, and the inlet closed, during the .torce-stroke ofthe piston, and that during the return-stroke of the piston the exhaustshall be closed, and the steam-inlet opem Third, in the. arrangement ofthe cylinder and its valves, wholly or partly beneath the water in theboiler, for the purpose otlubricating and cooling the bearings andutilizing the heat force.

A, in the dra-wing, represents alsteam-boiler.

J J', two vertical cylinders, open at theirlower ends, and reachingnearly to the bottom oltbe boiler. The. openings may be graduated intheir size to regulate the velocity of the piston.

In those cylindels are pistons K K', which are connected te aworking-beam, L, through' the rods lf.

In the iipper or steam section of the chamber D project the open ends ofsteam ii1let-pip'es'i z", which at vthe other end forma junction withthe cylinders J J',

at a point above the highest upward throw oi the pis ton.

jj represent valves in the said pipes c' The water will exert allett'ective and continual force on the bottom ot' the piston, and cause aconstant ten-- dency therein to rise. \Vheuever, therefore, theexhaust-valve ot' J and the inlet-valve ot' J are opened simultaneously,the pressure ot'the water iu the latter being balanced by the steam, thepiston in J willbe rapidly carried up, and that in J' forced down. Bythis process the wat-er is utilized, and the engine .is enabled to worksteam ot' very high temperatures.

The cylinders J J may he arranged outside of the boiler and connectedwith the same by suitable means, so as to be operated by steam alone, orsteam and water combined, cach being conveyed thereto by inlet pipes. Av

The mechanism for operating-the various valves may be of anysuitablekiml. 'lhat given is merely illustrative, and not a necessarypart ot' my invention.

Also, the cylinders are represented as operating in diiplicate, but cachengine may be made iudepemleut.

Having thus described my new method ot' operating the piston ot' anengine, aml the mechanism which-1 preferably employ forthat purpose,

Vhat l consider as ot' my invention, anddcsire to protect by LettersPatent, is-

1. The method, above described, of applying steam pressurecontiuuouslyto one side coujointly with steam pressure intermittently tothe other side, to reciprocate a piston. l

2. A-cylnder, through one end of which steam presses continuously, andthrough whose opposite end steam is intermittently supplied to audexhausted l'rom it,by suitableluiechauism, in combination with asteamboiler to supply t-he steam for both purposes.

3. 'Ille arrangement ofthe steam-cylinder J or J audits valves withinthe boiler, and wholly or in part beneath the water therein, as and t'orthe purpose speciiied.

J. E. CULVER, M. I).

NVituesses 'FRANK BLOCKLEY,

WM; DEAN OvennLL.

